71145491329 has 16 divisors (see below), whose sum is σ = 79919216640. Its totient is φ = 62765228160.

The previous prime is 71145491321. The next prime is 71145491371. The reversal of 71145491329 is 92319454117.

It is a cyclic number.

It is not a de Polignac number, because 71145491329 - 2³ = 71145491321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71145491321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72324 + ... + 384085.

It is an arithmetic number, because the mean of its divisors is an integer number (4994951040).

Almost surely, 2^71145491329 is an apocalyptic number.

It is an amenable number.

71145491329 is a deficient number, since it is larger than the sum of its proper divisors (8773725311).

71145491329 is a wasteful number, since it uses less digits than its factorization.

71145491329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456840.

The product of its digits is 272160, while the sum is 46.

It can be divided in two parts, 7114549 and 1329, that added together give a triangular number (7115878 = T₃₇₇₂).

The spelling of 71145491329 in words is "seventy-one billion, one hundred forty-five million, four hundred ninety-one thousand, three hundred twenty-nine".